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    <title>Document</title>
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        h5新增的语义化标签   --- 对搜索引擎更加友好
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    <header>1</header>
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    <nav>导航</nav>
    <aside>侧边栏</aside>
    <main>主体</main>


    <article>
        <h3>文章标题</h3>
        <p>111111111111</p>
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    <section>区，块</section>


    


 

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